Pocket FM built a $500M+ business monetizing the most natural human emotion, curiosity. Every episode runs about 10 minutes and stops at a cliffhanger. The Zeigarnik effect keeps unfinished stories in your head, and Pocket FM put the payment step right where that itch peaks. There is no subscription. You buy the next episode with coins, a few at a time, so you pay for what you consume. A full library on a typical audio subscription would run a flat ~$15/mo. Pocket FM says its US listeners…